Viewing file:  test_sgmllib.py (11.61 KB) -rw-r--r--
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import pprint
import sgmllib
import unittest
from test import test_support
class EventCollector(sgmllib.SGMLParser):
def __init__(self):
self.events = []
self.append = self.events.append
sgmllib.SGMLParser.__init__(self)
def get_events(self):
# Normalize the list of events so that buffer artefacts don't
# separate runs of contiguous characters.
L = []
prevtype = None
for event in self.events:
type = event[0]
if type == prevtype == "data":
L[-1] = ("data", L[-1][1] + event[1])
else:
L.append(event)
prevtype = type
self.events = L
return L
# structure markup
def unknown_starttag(self, tag, attrs):
self.append(("starttag", tag, attrs))
def unknown_endtag(self, tag):
self.append(("endtag", tag))
# all other markup
def handle_comment(self, data):
self.append(("comment", data))
def handle_charref(self, data):
self.append(("charref", data))
def handle_data(self, data):
self.append(("data", data))
def handle_decl(self, decl):
self.append(("decl", decl))
def handle_entityref(self, data):
self.append(("entityref", data))
def handle_pi(self, data):
self.append(("pi", data))
def unknown_decl(self, decl):
self.append(("unknown decl", decl))
class CDATAEventCollector(EventCollector):
def start_cdata(self, attrs):
self.append(("starttag", "cdata", attrs))
self.setliteral()
class SGMLParserTestCase(unittest.TestCase):
collector = EventCollector
def get_events(self, source):
parser = self.collector()
try:
for s in source:
parser.feed(s)
parser.close()
except:
#self.events = parser.events
raise
return parser.get_events()
def check_events(self, source, expected_events):
try:
events = self.get_events(source)
except:
import sys
#print >>sys.stderr, pprint.pformat(self.events)
raise
if events != expected_events:
self.fail("received events did not match expected events\n"
"Expected:\n" + pprint.pformat(expected_events) +
"\nReceived:\n" + pprint.pformat(events))
def check_parse_error(self, source):
parser = EventCollector()
try:
parser.feed(source)
parser.close()
except sgmllib.SGMLParseError:
pass
else:
self.fail("expected SGMLParseError for %r\nReceived:\n%s"
% (source, pprint.pformat(parser.get_events())))
def test_doctype_decl_internal(self):
inside = """\
DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.01//EN'
SYSTEM 'http://www.w3.org/TR/html401/strict.dtd' [
<!ELEMENT html - O EMPTY>
<!ATTLIST html
version CDATA #IMPLIED
profile CDATA 'DublinCore'>
<!NOTATION datatype SYSTEM 'http://xml.python.org/notations/python-module'>
<!ENTITY myEntity 'internal parsed entity'>
<!ENTITY anEntity SYSTEM 'http://xml.python.org/entities/something.xml'>
<!ENTITY % paramEntity 'name|name|name'>
%paramEntity;
<!-- comment -->
]"""
self.check_events(["<!%s>" % inside], [
("decl", inside),
])
def test_doctype_decl_external(self):
inside = "DOCTYPE html PUBLIC '-//W3C//DTD HTML 4.01//EN'"
self.check_events("<!%s>" % inside, [
("decl", inside),
])
def test_underscore_in_attrname(self):
# SF bug #436621
"""Make sure attribute names with underscores are accepted"""
self.check_events("<a has_under _under>", [
("starttag", "a", [("has_under", "has_under"),
("_under", "_under")]),
])
def test_underscore_in_tagname(self):
# SF bug #436621
"""Make sure tag names with underscores are accepted"""
self.check_events("<has_under></has_under>", [
("starttag", "has_under", []),
("endtag", "has_under"),
])
def test_quotes_in_unquoted_attrs(self):
# SF bug #436621
"""Be sure quotes in unquoted attributes are made part of the value"""
self.check_events("<a href=foo'bar\"baz>", [
("starttag", "a", [("href", "foo'bar\"baz")]),
])
def test_xhtml_empty_tag(self):
"""Handling of XHTML-style empty start tags"""
self.check_events("<br />text<i></i>", [
("starttag", "br", []),
("data", "text"),
("starttag", "i", []),
("endtag", "i"),
])
def test_processing_instruction_only(self):
self.check_events("<?processing instruction>", [
("pi", "processing instruction"),
])
def test_bad_nesting(self):
self.check_events("<a><b></a></b>", [
("starttag", "a", []),
("starttag", "b", []),
("endtag", "a"),
("endtag", "b"),
])
def test_bare_ampersands(self):
self.check_events("this text & contains & ampersands &", [
("data", "this text & contains & ampersands &"),
])
def test_bare_pointy_brackets(self):
self.check_events("this < text > contains < bare>pointy< brackets", [
("data", "this < text > contains < bare>pointy< brackets"),
])
def test_attr_syntax(self):
output = [
("starttag", "a", [("b", "v"), ("c", "v"), ("d", "v"), ("e", "e")])
]
self.check_events("""<a b='v' c="v" d=v e>""", output)
self.check_events("""<a b = 'v' c = "v" d = v e>""", output)
self.check_events("""<anbn=n'v'ncn=n"v"ndn=nvne>""", output)
self.check_events("""<atbt=t'v'tct=t"v"tdt=tvte>""", output)
def test_attr_values(self):
self.check_events("""<a b='xxx\n\txxx' c="yyy\t\nyyy" d='\txyz\n'>""",
[("starttag", "a", [("b", "xxxntxxx"),
("c", "yyytnyyy"),
("d", "txyzn")])
])
self.check_events("""<a b='' c="">""", [
("starttag", "a", [("b", ""), ("c", "")]),
])
# URL construction stuff from RFC 1808:
safe = "$-_.+"
extra = "!*'(),"
reserved = ";/?:@&="
url = "http://example.com:8080/path/to/file?%s%s%s" % (
safe, extra, reserved)
self.check_events("""<e a=%s>""" % url, [
("starttag", "e", [("a", url)]),
])
# Regression test for SF patch #669683.
self.check_events("<e a=rgb(1,2,3)>", [
("starttag", "e", [("a", "rgb(1,2,3)")]),
])
def test_attr_funky_names(self):
self.check_events("""<a a.b='v' c:d=v e-f=v>""", [
("starttag", "a", [("a.b", "v"), ("c:d", "v"), ("e-f", "v")]),
])
def test_illegal_declarations(self):
s = 'abc<!spacer type="block" height="25">def'
self.check_events(s, [
("data", "abc"),
("unknown decl", 'spacer type="block" height="25"'),
("data", "def"),
])
def test_weird_starttags(self):
self.check_events("<a<a>", [
("starttag", "a", []),
("starttag", "a", []),
])
self.check_events("</a<a>", [
("endtag", "a"),
("starttag", "a", []),
])
def test_declaration_junk_chars(self):
self.check_parse_error("<!DOCTYPE foo $ >")
def test_get_starttag_text(self):
s = """<foobar \n one="1"\ttwo=2 >"""
self.check_events(s, [
("starttag", "foobar", [("one", "1"), ("two", "2")]),
])
def test_cdata_content(self):
s = ("<cdata> <!-- not a comment --> ¬-an-entity-ref; </cdata>"
"<notcdata> <!-- comment --> </notcdata>")
self.collector = CDATAEventCollector
self.check_events(s, [
("starttag", "cdata", []),
("data", " <!-- not a comment --> ¬-an-entity-ref; "),
("endtag", "cdata"),
("starttag", "notcdata", []),
("data", " "),
("comment", " comment "),
("data", " "),
("endtag", "notcdata"),
])
s = """<cdata> <not a='start tag'> </cdata>"""
self.check_events(s, [
("starttag", "cdata", []),
("data", " <not a='start tag'> "),
("endtag", "cdata"),
])
def test_illegal_declarations(self):
s = 'abc<!spacer type="block" height="25">def'
self.check_events(s, [
("data", "abc"),
("unknown decl", 'spacer type="block" height="25"'),
("data", "def"),
])
def test_enumerated_attr_type(self):
s = "<!DOCTYPE doc [<!ATTLIST doc attr (a | b) >]>"
self.check_events(s, [
('decl', 'DOCTYPE doc [<!ATTLIST doc attr (a | b) >]'),
])
# XXX These tests have been disabled by prefixing their names with
# an underscore. The first two exercise outstanding bugs in the
# sgmllib module, and the third exhibits questionable behavior
# that needs to be carefully considered before changing it.
def _test_starttag_end_boundary(self):
self.check_events("""<a b='<'>""", [("starttag", "a", [("b", "<")])])
self.check_events("""<a b='>'>""", [("starttag", "a", [("b", ">")])])
def _test_buffer_artefacts(self):
output = [("starttag", "a", [("b", "<")])]
self.check_events(["<a b='<'>"], output)
self.check_events(["<a ", "b='<'>"], output)
self.check_events(["<a b", "='<'>"], output)
self.check_events(["<a b=", "'<'>"], output)
self.check_events(["<a b='<", "'>"], output)
self.check_events(["<a b='<'", ">"], output)
output = [("starttag", "a", [("b", ">")])]
self.check_events(["<a b='>'>"], output)
self.check_events(["<a ", "b='>'>"], output)
self.check_events(["<a b", "='>'>"], output)
self.check_events(["<a b=", "'>'>"], output)
self.check_events(["<a b='>", "'>"], output)
self.check_events(["<a b='>'", ">"], output)
output = [("comment", "abc")]
self._run_check(["", "<!--abc-->"], output)
self._run_check(["<", "!--abc-->"], output)
self._run_check(["<!", "--abc-->"], output)
self._run_check(["<!-", "-abc-->"], output)
self._run_check(["<!--", "abc-->"], output)
self._run_check(["<!--a", "bc-->"], output)
self._run_check(["<!--ab", "c-->"], output)
self._run_check(["<!--abc", "-->"], output)
self._run_check(["<!--abc-", "->"], output)
self._run_check(["<!--abc--", ">"], output)
self._run_check(["<!--abc-->", ""], output)
def _test_starttag_junk_chars(self):
self.check_parse_error("<")
self.check_parse_error("<>")
self.check_parse_error("</$>")
self.check_parse_error("</")
self.check_parse_error("</a")
self.check_parse_error("<$")
self.check_parse_error("<$>")
self.check_parse_error("<!")
self.check_parse_error("<a $>")
self.check_parse_error("<a")
self.check_parse_error("<a foo='bar'")
self.check_parse_error("<a foo='bar")
self.check_parse_error("<a foo='>'")
self.check_parse_error("<a foo='>")
self.check_parse_error("<a foo=>")
def test_main():
test_support.run_unittest(SGMLParserTestCase)
if __name__ == "__main__":
test_main()
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